Mixed species flocks The Whistler 9 (2015): 63-64 Increased understorey causes demise of mixed species flocks at Green Wattle Creek Mike Newman 72 Axiom Way, Acton Park, Tasmania 7170, Australia.
[email protected] I published an article titled “Mixed foraging flocks mobile honeyeaters appeared to be transient rather in a Woodville woodland” in the Hunter Bird than constant members of the group. Observers Club Newsletter October/November 1997. The article was based on observations made The third flock frequented intermediate habitat, during my monthly bird survey at Green Wattle combining open areas with some scrub Creek (32.661°S 151.649°E) on 12 July 1997 understorey. In this flock the seemingly inevitable (Newman 2009). On that date I came across three Speckled Warbler shared the understorey with separate foraging groups. Speckled Warbler White-browed Scrub-wren Sericornis frontalis and Chthonicola sagittata and Jacky Winter Microeca Silvereye Zosterops lateralis together with fairy- fascinans were conspicuous members of these wrens. Thornbills and honeyeaters, including groups and the scolding calls of the former species Lewin’s Honeyeater Meliphaga lewinii, were often drew attention to the groups. present in the lower foliage of the trees together with an immature Rose Robin Petroica rosea. My newsletter article indicated that while each of the flocks had Speckled Warblers as core The formation of these flocks was seasonal at members, there were subtle differences in the Green Wattle Creek, primarily occurring in autumn composition of the flocks, possibly as a and winter. During these seasons other species, consequence of variations in the habitat they including Spotted Pardalote Pardalotus punctatus frequented.